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    <title>Document</title>
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    <script>
            var removeDuplicates = function(nums) {
            var arr = []
            for(var i= 0; i<nums.length;i++){
                if(nums.indexOf(nums[i])===i){
                    arr.push(nums[i])
                    }
                }
                return arr
            };
            let oldArr = [1, 2, 3, 4, 5, 5 , 6, 7, 8, 2, 3];
            const newArr = removeDuplicates(oldArr)
            console.log(newArr)
    </script>   
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